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Martin Kaymer's sand shot master class

The Northern Ireland golfer also switched to Nike clubs in a multimillion-dollar deal at the start of last season and found the transition from his former Titleist equipment wasn't quite as smooth as he would have liked.

But he believes he has now quite literally got into the swing with his new equipment.

"It would be fantastic to be 100% comfortable with all 14 clubs at the same time," McIlroy said.

"It was worth taking the time to get it right. I'm pretty settled with the kit, to be honest."

The tournament at the PGA National course will unite seven of the world's top-10 players -- more than in any event of the season so far.

It is also the first tournament of 2014 where the top three -- Tiger Woods, Adam Scott and Henrik Stenson -- have competed in the same field.

However, U.S. Open champion Justin Rose had to drop out of the event at the last minute because of tendinitis in his right shoulder.